H04N5/235—Circuitry or methods for compensating for variation in the brightness of the object, e.g. based on electric image signals provided by an electronic image sensor

H04N5/243—Circuitry or methods for compensating for variation in the brightness of the object, e.g. based on electric image signals provided by an electronic image sensor by influencing the picture signal, e.g. signal amplitude gain control

Abstract

There is a demand to widen the dynamic range of imaging units. Therefore, provided is an imaging unit equipped with a pixel unit that outputs the reset potential after a reset and a pixel signal corresponding to the signal potential after charge accumulation, an amplifier unit that amplifies the pixel signal at a first amplification or a second amplification that differs from the first amplification, and a control unit that amplifies the pixel signal corresponding to the change from the signal potential to the reset potential at the second amplification after the pixel signal corresponding to the change from the reset potential to the signal potential was amplified by the first amplification in the amplifier unit.

Description

Translated from Chinese

摄像单元、摄像装置以及控制程序 Imaging means, the imaging means and the control program

技术领域 FIELD

[0001] 本发明涉及摄像单元、摄像装置以及控制程序。 [0001] The present invention relates to an imaging unit, an imaging device and a control program.

背景技术 Background technique

[0002] 已知有将根据入射光而由像素部生成的像素信号由按每条垂直信号线设置的放大电路放大并读出的CMOS型的摄像单元。 [0002] are known CMOS type image pickup unit and the pixel signal generated by the enlarged portion and the pixel read out by the amplifier circuit according to each of the vertical signal lines disposed in accordance with the incident light.（例如，参照专利文献1)。 (E.g., refer to Patent Document 1).

[0004] 与入射光相应的电荷在积累于浮置扩散单元（floating diffusion)后向垂直信号线输出，并读出由放大电路放大后的信号。 [0004] The incident light corresponding to the charge output to the vertical signal lines in the accumulation unit to the floating diffusion (floating diffusion), and reads out the signal amplified by the amplifier circuit.因为在读出来自浮置扩散单元的电荷后浮置扩散单兀被重置，所以相对于一次光入射，放大电路的放大率被限制为一种。 Since the read out unit charge from the floating diffusion floating diffusion is reset single Wu, the incident light with respect to time, the amplifier circuit is restricted to one magnification.若与入射光较强从而积累于浮置扩散单元的电荷多的情况相配合地降低放大率，则从入射光较弱的区域读出的信号变弱。 If the incident light is strong so that the charge accumulated in the floating diffusion unit cooperating more cases reduce the magnification, the incident light is weak from the signal read area becomes weak.相反地，若配合入射光较弱的区域而提高放大率，则从入射光较强的区域读出的信号会饱和。 Conversely, if the incident light is weak in the region with the magnification increases, the incident light from the area of ​​strong signal will be read out of saturation.因此，摄像单元的动态范围受限，期望更广的动态范围。 Thus, the dynamic range of the imaging unit is limited, a desired wide dynamic range.

[0005] 在本发明的第一方案中提供一种摄像单元，其具备：像素部，该像素部输出与重置后的重置电位和电荷积累后的信号电位对应的像素信号；放大器部，该放大器部将像素信号以第一放大率或与第一放大率不同的第二放大率放大；以及控制部，该控制部使放大器部在将与从重置电位向信号电位的变动对应的像素信号以第一放大率放大后，将与从信号电位向重置电位的变动对应的像素信号以第二放大率放大。 [0005] In a first embodiment the present invention provides in an imaging unit, comprising: a pixel reset signal potential and the potential after the charge of the pixel portion, the pixel portion corresponding to the accumulated output reset; amplifier portion, the amplifier section amplifies the pixel signal to a first or a second amplification factor different from the magnification of the first magnification; and a control unit, the amplifier portion of the control unit and the corresponding pixels from the reset potential to the signal potential variation in after a first amplification factor to the signal, the amplified signal at a second amplification factor of the pixel corresponding to the signal potential from the reset potential fluctuation.

[0006] 在本发明的第二方案中，提供一种控制程序，该控制程序用于摄像单元，该摄像单元具备：光电转换部；传输门，该传输门将由光电转换部产生的电荷向浮置扩散单元传输； 像素重置开关，该像素重置开关将积累于所述浮置扩散单元的所述电荷排除，从而将所述浮置扩散单元的电位从所述信号电位重置为所述重置电位；以及放大器部，该放大器部将基于所述浮置扩散单元的电位而输出的像素信号放大，所述控制程序使计算机执行如下步骤：通过使传输门断开并使重置开关接通而使浮置扩散单元的电位成为重置电位的步骤； 通过使重置开关断开并使传输门在接通一定期间后断开而使所述浮置扩散单元的电位成为信号电位，并输出与从重置电位向信号电位的变动对应的像素信号即第一像素信号的步骤；使放大器部将第一像素信号通过第一放大率 [0006] In a second embodiment of the present invention, there is provided a control program, the control program for the image pickup unit, the imaging unit includes: a photoelectric conversion portion; transfer gate, the transfer gate charge generated by the photoelectric conversion section to the floating diffusion transfer unit; pixel reset switch, the reset switch of the pixel to the charge accumulated in the floating diffusion unit is excluded, so that the potential of the floating diffusion unit, a reset signal from the potential of the reset potential; and an amplifier unit, the amplifier portion based on the potential of the floating diffusion unit and amplifying a pixel signal outputted from the control program causing a computer to execute the steps of: by the transfer gate and the reset switch contact OFF potential on the floating diffusion unit step becomes reset potential; by making the reset switch is turned off and the transmission gate is turned off so that the potential of the floating unit diffusion potential after a signal is turned on for a certain period, and the step of outputting a pixel signal corresponding to the potential of the reset signal changes from the potential signal, i.e., a first pixel; the first portion of the amplifier by the first pixel signal amplification factor大的步骤；通过再次使重置开关接通而使浮置扩散单元的电位成为重置电位，并输出与从信号电位向重置电位的变动对应的像素信号即第二像素信号的步骤；以及使放大器部将第二像素信号通过第二放大率放大的步骤。 Large step; reset switch is turned on again by means of the potential of the floating diffusion potential becomes reset, and outputs the pixel signal corresponding to the signal potential from the reset potential fluctuation of the second step, i.e., the pixel signal; so that the amplifier portion of the second pixel signal amplification factor of the second step.

[0007] 此外，上述发明的概要并没有列举本发明的全部的必要特征。 [0007] The summary of the invention, not all the essential features of the present invention is exemplified.另外，这些特征组的子组合（sub-combination)也能够成为发明。 Further, sub-combinations of these feature groups (sub-combination) can also be included in the invention.

附图说明 BRIEF DESCRIPTION

[0008] 图1是说明本发明的实施方式的摄像装置的构成的图。 [0008] FIG. 1 is a diagram for explaining a configuration of an embodiment of the present invention, an imaging apparatus.

[0009] 图2是说明本发明的实施方式的摄像单元的构成的图。 [0009] FIG. 2 is a diagram showing the configuration of the embodiments of the present invention, an image pickup unit.

[0011] 图4是表示摄像单元的1水平期间的动作定时的时序图。 [0011] FIG. 4 is a diagram showing the operation of the imaging unit during a horizontal timing of a timing chart.

[0012] 图5是说明摄像装置的图像处理的图。 [0012] FIG. 5 is a diagram of an image processing of the image pickup apparatus.

[0013] 图6是说明摄像单元的构成的另外一例的图。 [0013] FIG. 6 is a diagram showing a configuration of another example of the imaging unit.

[0014] 图7是说明由摄像装置进行的图像处理的流程图。 [0014] FIG. 7 is a flowchart illustrating image processing performed by the imaging apparatus.

具体实施方式 detailed description

[0015] 以下，通过发明的实施方式来说明本发明，但以下的实施方式并不限定权利要求书涉及的发明。 [0015] Hereinafter, the present invention will be described by way of embodiment of the invention, but the following embodiments do not limit the claims of the invention relates to a book.另外，实施方式中说明的特征组合对于发明的解决方法不一定全部是必须的。 Further, combinations of the features described in the embodiments for the method of the invention are not necessarily all solution is necessary.

[0016] 图1是说明本发明的实施方式的摄像装置900的构成的图。 [0016] FIG. 1 is a diagram illustrating a configuration of an imaging apparatus 900 according to an embodiment of the present invention.摄像装置900具备摄像单元910、图像处理部912、工作存储器918、显示部920、摄像存储器922、总线926、摄像系统控制部924、AE传感器916以及受理部914。 The imaging apparatus 900 includes an imaging unit 910, the image processing unit 912, a work memory 918, a display unit 920, image memory 922, bus 926, the imaging system control unit 924, AE sensor 916 and the receiving unit 914.摄像单元910、图像处理部912、显示部920、工作存储器918、摄像存储器922以及摄像系统控制部924与总线926连接，并经由总线926相互地发送接收信号。 The imaging unit 910, the image processing unit 912, a display unit 920, a work memory 918, a memory 922, and the imaging unit 924 and imaging control system connected to the bus 926, and 926 transmit and receive signals to each other via a bus.

[0017] 摄像单元910具备二维地排列有多个光电转换元件的CMOS传感器等图像传感器。 [0017] The imaging unit 910 includes a plurality of two-dimensionally arrayed photoelectric conversion element of a CMOS sensor and other image sensor.摄像单元910具备控制部700。 The imaging unit 910 includes a control unit 700.摄像单元910被摄像系统控制部924控制，输出将从被摄物体像得到的像素信号放大后的放大信号。 The imaging unit 910 is a control section 924 controls the imaging system, the output from the subject image signal amplified pixel signal obtained after amplification.摄像系统控制部924以及控制部700可以共同作为摄像单元910的控制部发挥功能。 The system control section 924 and the imaging control unit 700 may function together as a control unit 910 of the imaging unit.

[0018] 图像处理部912将工作存储器918作为工作区而实施各种图像处理，生成图像数据。 [0018] The image processing unit 912 work memory 918 as a work area and various image processing, generates image data.生成的图像数据通过图像处理部912而被转换为显示信号，能够显示在显示部920中。 The generated image data is converted by the image processing unit 912 is a display signal can be displayed on the display unit 920.另外，图像数据能够记录于摄像存储器922。 Further, the image data in the image memory 922 can be recorded.

[0019] AE传感器916是针对被摄物体空间设定有多个测光区域的测光传感器，在各个测光点检测被摄物体像的亮度。 [0019] AE sensor 916 is to set a plurality of areas of the light metering sensor for metering the subject space, the brightness of the subject image in each of photometric detection.一系列摄影过程通过受理部914受理使用者的操作并向摄像系统控制部924输出操作信号而开始。 Process 914 receives a series of photographic operations by the user to the imaging unit receives the system control unit 924 outputs an operation signal is started.另外，受理部914受理由使用者进行的ISO感光度的选择，并将其向摄像系统控制部924发送。 Further, the receiving unit 914 receives the ISO sensitivity selection by the user, and sends it to the camera system control section 924.摄像系统控制部924将与受理部914所受理的ISO感光度对应的放大率向控制部700发送。 The imaging system control unit 924 receives the accepting unit 914 ISO sensitivity of the amplification factor corresponding to the transmission control unit 700.

[0020] 摄影过程所附带的AF、AE等各种动作由摄像系统控制部924控制并执行。 [0020] The photographic process accompanying AF, AE and performs various actions such as the imaging system control unit 924 by the control.例如， 摄像系统控制部924解析AE传感器916的检测信号，将与最佳的ISO感光度对应的像素信号的放大率向控制部700发送。 For example, the imaging system control unit 924 parses the detection signal of the AE sensor 916, the amplification factor of the pixel signals corresponding to the optimal ISO speed transmission to the control unit 700.

[0021] 图2是说明本发明的实施方式的摄像单元910的构成的图。 [0021] FIG. 2 is a diagram for explaining a configuration of an embodiment of the present invention, the imaging unit 910.摄像单元910具备像素部110、负载电流源201、列增幅放大器部300、电位保持部400、读出电路500、垂直扫描部600、控制部700、AFE710 以及ADC720。 The imaging unit 910 includes a pixel portion 110, a load current source 201, an increase of the column amplifier unit 300, potential holding portion 400, readout circuitry 500, the vertical scanning unit 600, a control unit 700, AFE710 and ADC720.

[0022] 摄像单元910在像素部110具备多个单位像素100。 [0022] The image pickup unit 910 in the pixel portion 110 includes a plurality of unit pixels 100.多个单位像素100矩阵状地配置。 A plurality of unit pixels 100 arranged in a matrix.各个单位像素100与垂直信号线200以及控制线202连接。 Respective unit pixels 100 connected to the vertical signal line 200 and control line 202.控制线202也可以由多根信号线构成来提高信号的传输效率。 The control line 202 may be composed of a plurality of signal lines to improve the transmission efficiency of signals.配置于同一行的单位像素1〇〇与共用的控制线202 连接。 Arranged in the same row of the unit pixels 1〇〇 connected to a common control line 202.控制线202与垂直扫描部600连接。 A control line 202 connected to the vertical scanning unit 600.配置于同一列的单位像素100与共用的垂直信号线200连接。 Arranged in the same column of the unit pixel 100 connected to a common vertical signal line 200.像素信号从单位像素100向垂直信号线200的读出，经由控制线202而由垂直扫描部600控制。 The pixel signals from the unit pixel 100 is read to the vertical signal line 200 a, and 600 via the control line 202 is controlled by the vertical scanning unit.

[0023] 垂直信号线200经由列增幅放大器部300以及电位保持部400而与读出电路500 连接。 [0023] The vertical signal line 200 and the holding unit 400 and the read circuit 500 is connected via the column amplifier portion 300 and a potential increase.负载电流源201向垂直信号线200供给电流。 Load current source 201 supplies a current to the vertical signal line 200.列增幅放大器部300将从单位像素100 读出的像素信号放大，并将被放大后的像素信号即放大信号发送至电位保持部400。 The booster amplifier of the pixel signal sequence portion 300 reads out from the pixel unit 100 amplifies the pixel signal and the amplified signal is transmitted to a potential that is amplified holding portion 400.电位保持部400保持放大信号，并在控制部700所控制的定时，将放大信号发送至读出电路500。 Potential holding portion 400 holding the amplified signal, and controls the timing control unit 700, transmits the amplified signal to the read out circuit 500.读出电路500将放大信号发送至AFE710。 Readout circuit 500 transmits the amplified signal to AFE710.

[0024] AFE710使放大信号的电平一致，并将其发送至ADC720。 [0024] AFE710 that the same level of the amplified signal, and transmits it to ADC720.ADC720将从AFE710接收的信号转换为数字信号并输出。 Signal conversion from ADC720 AFE710 received digital signal and outputs.AFE710以及ADC720可以与摄像单元910的其他构成要素设置在同一基板上，但并不限于此，也可以将AFE710以及ADC720设置在另外的基板上，并通过布线或凸块（bump)与设置有摄像单元910的其他构成要素的基板电连接。 ADC720 AFE710 and other components may be provided in the imaging unit 910 on the same substrate, but is not limited thereto, and may be AFE710 ADC720 further disposed on the substrate, and through a wire or bump (Bump) provided with a camera other components of the substrate unit 910 is electrically connected.垂直扫描部600、列增幅放大器部300、电位保持部400以及读出电路500与控制部700电连接，并被控制部700控制。 A vertical scanning portion 600, an increase of the column amplifier unit 300, potential holding portion 400 and a readout circuit 500 is electrically connected to the control unit 700, and the control unit 700 controls.

[0026] 光电转换部101将接受的光转换为电荷并积累。 [0026] The photoelectric conversion unit 101 converts the received light into electric charge and accumulated.光电转换部101的一个例子为光电二极管。 An example of the photoelectric conversion portion 101 is a photodiode.控制部700使传输门102将由光电转换部101产生的电荷向浮置扩散单元103 传输。 The charge control unit 700 of the photoelectric conversion unit 102 by the transfer gate 101 generates a transmission unit 103 to the floating diffusion.控制部700使浮置扩散单元103将经由传输门102传输来的电荷积累。 The control unit 700 causes the floating diffusion charge accumulation unit 103 via the transmission gate 102 to the transmission.控制部700 使与浮置扩散单元103连接的像素重置开关104将浮置扩散单元所积累的电荷排除，从而使浮置扩散单元103的电位从信号电位重置为重置电位。 Pixel reset switch 104 and the control unit 700 causes the floating diffusion unit 103 is connected to the charge accumulation unit, the floating diffusion excluded, so that the potential of the floating diffusion unit 103 is reset to a reset potential from the signal potential.

[0027] 像素放大器105与浮置扩散单元103连接，将浮置扩散单元103的电位放大并输出。 [0027] The pixel amplifier 105 and the floating diffusion unit 103, unit 103 of the potential of the floating diffusion amplifies and outputs.选择开关106与像素放大器105以及垂直信号线200连接。 Selection switch 106 connected to the pixel amplifier 105 and the vertical signal line 200.负载电流源201与垂直信号线200连接。 Load current source 201 is connected to the vertical signal line 200.

[0028] 列增幅放大器部300具备输入电容器301、列增幅放大器重置开关302、第一反馈电容器选择开关304、第一反馈电容器303、第二反馈电容器选择开关306、第二反馈电容器305以及放大器308。 [0028] increase of the column amplifier unit 300 includes an input capacitor 301, an increase of the column amplifier reset switch 302, a first feedback capacitor selection switch 304, a first feedback capacitor 303, a second feedback capacitor selection switch 306, a second feedback capacitor 305 and an amplifier 308.输入电容器301与垂直信号线200连接。 Input capacitor 200 is connected to the vertical signal line 301.输入电容器301与放大器308的输入端子的一方连接。 Input capacitor 301 and the input terminal of the amplifier 308 is connected to one.在放大器308的另一方的输入端子上连接有VREF，处于基准电位。 VREF is connected to the other input terminal of the amplifier 308, at the reference potential.放大器308的反馈回路并联地具备：列增幅放大器重置开关302 ;第一反馈电容器选择开关304及第一反馈电容器303 ;以及第二反馈电容器选择开关306和第二反馈电容器305。 Parallel amplifier feedback loop 308 includes: a column booster amplifier reset switch 302; a first feedback capacitor selection switch 304 and the first feedback capacitor 303; and a second feedback capacitor selection switch 306 and a second feedback capacitor 305.第一反馈电容器选择开关304与第一反馈电容器303串联地连接。 A first feedback capacitor selection switch 304 and the first feedback capacitor 303 connected in series.第二反馈电容器选择开关306与第二反馈电容器305串联地连接。 Second feedback capacitor selection switch 306 is connected to the second feedback capacitor 305 in series.

[0029] 电位保持部400具备重置电位输入开关402、重置电位保持电容器404、信号电位输入开关403、信号电位保持电容器405、重置电位输出开关406以及信号电位输出开关407。 [0029] The potential holding portion 400 includes a reset potential of the input switch 402, the reset potential holding capacitor 404, a potential of the input signal switch 403, a signal level holding capacitor 405, a reset switch 406 and the potential of the output potential of the output signal of switch 407.重置电位输入开关402以及信号电位输入开关403并联地与列增幅放大器部300的输出连接。 The reset switch 402 and the potential of the input signal potential of the input switch 403 is connected in parallel to increase the output amplifier portion 300 of the column.重置电位保持电容器404与重置电位输入开关402连接。 Reset potential holding capacitor 404 is connected to the reset potential of the input switch 402.重置电位输出开关406 与重置电位保持电容器404连接。 The reset potential of the output potential of the reset switch 406 is connected to the holding capacitor 404.重置电位输出开关406与读出电路500连接。 The potential of the reset switch 406 and the output of the readout circuit 500 is connected.信号电位保持电容器405与信号电位输入开关403连接。 The potential of the signal holding capacitor 405 and switch 403 connected to the input signal potential.信号电位输出开关407与信号电位保持电容器405连接。 A signal potential of the output holding capacitor 405 switch 407 connected to the signal potential.信号电位输出开关407与读出电路500连接。 Potential of the output switch 407 and a signal readout circuit 500 is connected.

[0030] 图4是表示摄像单元910的1水平期间的动作定时的时序图。 [0030] FIG. 4 is a timing chart showing operation timing during a horizontal imaging unit 910.图4所示的摄像单元910的动作由控制部700控制。 Figure 4 shows the operation of the imaging unit 910 is controlled by the control unit 700.第一期间（tl)内，像素重置开关104以及传输门102接通规定的时间。 The first period (tl), pixel reset switch 104 is turned on and a predetermined time of transmission gate 102.即、 which is,

以及 as well as

成为接通状态的电位。 Becomes the potential ON state.由此，光电转换部1〇1以及浮置扩散单元103的电位被重置。 Accordingly, the photoelectric conversion portion and the potential of the floating diffusion 1〇1 unit 103 is reset.此时，摄像单元910的全部的光电转换部101以及浮置扩散单元103的电位可以同时被重置。 At this time, the potential of all the photoelectric conversion unit 910 of the imaging unit 101 and a floating diffusion unit 103 may be reset simultaneously.

[0031] 在第二期间（t2)内，光电转换部101将接受的光转换为电荷并积累。 [0031] In the second period (t2) within the photoelectric conversion unit 101 converts the received light into electric charge and accumulated.光电转换部101的电荷积累由摄像系统控制部924对摄像单兀910设定的曝光时间决定。 Charge accumulation of the photoelectric conversion unit 101 of the imaging system 924 is determined by the control unit 910 of the imaging unit Wu set exposure time.

[0032] 在第三期间（t3)内，选择开关106接通。 [0032] In the third period (t3) the selection switch 106 is turned on.另外，像素重置开关104接通规定的时间。 Further, pixel reset switch 104 is turned on a predetermined time.即、 which is,

成为接通状态的电位， Becomes the potential ON state,

在规定的时间内成为接通状态的电位。 Within a predetermined time becomes the potential ON state.由此，浮置扩散单元103成为重置后的重置电位。 Thus, the floating diffusion unit 103 is reset to reset potential after.

[0033] 在列增幅放大器部300中，在第三期间（t3)内，列增幅放大器重置开关302以及第二反馈电容器选择开关306接通规定的时间。 [0033] increase in the column amplifier unit 300, (t3) in the third period, an increase of the column amplifier reset switch 302 and a second feedback capacitor selection switch 306 is turned on a predetermined period of time.即. which is.

以及' as well as'

成为接通状态的电位。 Becomes the potential ON state.另夕卜， Another evening Bu,

成为接通状态的电位，第一反馈电容器选择开关304接通。 Becomes the potential ON state, a first feedback capacitor selection switch 304 is turned on.由此，放大器308的输入端子被重置。 Thus, the input terminal of the amplifier 308 is reset.

[0034] 接下来，在规定的时间后， [0034] Next, after a predetermined time,

以及 as well as

成为断开状态的电位，列增幅放大器重置开关302以及第二反馈电容器选择开关306断开。 The potential becomes OFF state, an increase of the column amplifier reset switch 302 and a second feedback capacitor selection switch 306 is turned off.此时，在第二反馈电容器选择开关306 断开后，列增幅放大器重置开关302断开。 At this time, the second feedback capacitor selection switch 306 is turned off, the booster amplifier of the column reset switch 302 is turned off.

保持接通状态的电位，第一反馈电容器选择开关304保持接通状态。 Holding potential ON state, a first feedback capacitor selection switch 304 is kept on.由此，列增幅放大器部300的放大率被设定为第一放大率，该第一放大率由输入电容器301的容量与第一反馈电容器303的容量之比决定。 Thus, the column amplification unit 300 for the booster amplifier is set to a first amplification factor, the amplification factor is determined by the input capacitance of the first capacitor 301 and the capacitance ratio of the first feedback capacitor 303.

[0035] 在第四期间（t4)内，在规定的时间内使 [0035] the inner (t4), so that within a fourth predetermined time period

成为接通状态的电压，从而将重置电位输入开关402接通。 A voltage ON state, whereby the potential of the input reset switch 402 is turned on.由此，浮置扩散单元103的电位被重置后的状态下的、与重置电位对应的电位被积累于重置电位保持电容器404。 Accordingly, in a state where the potential of the floating diffusion unit 103 is reset, and the reset potential is a potential corresponding to the potential accumulated in the holding capacitor 404 to reset.

[0036] 在第五期间（t5)内， [0036] In the fifth period (t5) inside,

在规定的时间内成为接通状态的电位，传输门102接通规定的时间。 An ON state is turned on a predetermined potential, the transfer gate 102 within a predetermined time period.由此在第二期间（t2)内由光电转换部101产生的电子被传输至浮置扩散单元103,浮置扩散单元103的电位从重置电位变为电荷积累后的信号电位。 Whereby electrons in the second period (t2) from the inside of the photoelectric conversion unit 101 is transferred to the floating diffusion unit 103, the potential of the floating diffusion unit 103 from the reset potential to the signal potential after charge accumulation.浮置扩散单元103 的电位的变动经由像素放大器105以及选择开关106传递至垂直信号线200。 The potential change of the floating diffusion unit 103 is transmitted through the pixel amplifier 105 and a selection switch 106 to the vertical signal line 200.由此，与重置电位和信号电位对应的像素信号从单位像素100输出至垂直信号线200。 Thus, the pixel signals corresponding to the reset potential and the potential of the signal output from the unit pixel 100 to the vertical signal line 200.从垂直信号线200向列增幅放大器部300输入与从重置电位向信号电位的变动对应的像素信号。 The pixel signals from the vertical signal line 200 to the input 300 corresponding to the column portion increased by the amplifier from the reset potential to the signal potential variation.输入至列增幅放大器部300的像素信号以由输入电容器301的容量与第一反馈电容器303的容量之比所决定的第一放大率被放大。 The pixel signal is input to the booster amplifier of the column portion 300 is amplified at a first amplification factor determined by the ratio of the input capacitance of the first capacitor 301 and the capacitance of the feedback capacitor 303.以第一放大率被放大后的第一放大信号从列增幅放大器部300向电位保持部400输出。 In the first amplified signal is amplified by the first amplification unit 400 to hold the output potential of the booster amplifier section 300 from the column.

[0037] 从列增幅放大器部300输出的第一放大信号的电位，在下式所示的Vout比列增幅放大器部300的电源电压小时，由Vout表示。 [0037], represented by the following formula Vout, Vout is represented by the potential of the first amplified signal from the column amplifier unit 300 increase than the supply voltage output from the amplifier portion 300 hours of growth the column.另外，在Vout为列增幅放大器部300的电源电压以上时，从列增幅放大器部300输出的第一放大信号的电位与列增幅放大器部300的电源电压相等。 Further, when the column Vout booster amplifier portion 300 above the power supply voltage is equal to the increase from the potential of the column amplifier unit and the first amplified signal booster amplifier portion 300 of the column output 300 of power supply voltage.

[0039] 作为一个例子，设，输入电容器301的容量为lpF、第一反馈电容器303的容量为〇· lpF、浮置扩散单元103的重置电位为4V、像素放大器105的增益为0· 8倍、VREF为2. 0V、 列增幅放大器部300的电源电压为5V。 [0039] As an example, it is assumed, input capacitor 301 is lpF, the capacity of the first feedback capacitor 303 is square-lpF, the reset potential of the floating diffusion unit 103 is 4V, the gain of the pixel amplifier 105 is 0.8 times, VREF is 2. 0V, the power supply voltage booster amplifier of the column portion 300 is 5V.而且，浮置扩散单元103的电位从重置电位4V开始， 在传输门102接通规定时间后，变为信号电位3V。 Further, the potential of the floating diffusion unit 103 starts from the reset potential of 4V, the transfer gate 102 is turned on after a predetermined time, the signal potential becomes 3V.此时，Vout = 2. 0V+ (4V - 3V) X0. 8X ( - lpF/0. lpF) = 10. 0V，比列增幅放大器部300的电源电压5V大。 In this case, Vout = 2. 0V + (4V - 3V) X0 8X. (- lpF / 0 lpF.) = 10. 0V, the power source voltage is larger than the column portion 300 of the booster amplifier 5V.因此，这时，从列增幅放大器部300输出的第一放大信号的电位为5V。 Thus, this time, the potential of the first amplified signal from the column portion 300 for the booster amplifier output is 5V.即、该情况下的第一放大信号成为饱和信号。 That is, the first amplified signal in this case is the signal becomes saturated.

[0040] 在传输门102断开后，信号电位输入开关403接通规定时间。 [0040] After the transmission gate 102 is turned off, the signal potential of the input switch 403 is turned on for a predetermined time.由此，在信号电位保持电容器405中保持根据入射光而从列增幅放大器部300输出的第一放大信号。 Accordingly, the potential in the signal holding capacitor 405 and the holding signal from the first amplifying unit 300 outputs the row booster amplifier in accordance with the incident light.

[0041] 在第六期间（t6)内， [0041] During the sixth (T6) inside,

成为接通状态的电位，重置电位输出开关406以及信号电位输出开关407接通规定的时间。 The potential becomes the ON state, turning on the reset switch 406 outputs a predetermined potential and a signal potential of the output switch 407 times.由此，与在第四期间（t4)内保持于重置电位保持电容器404的重置电位对应的信号以及与在第五期间（t5)内保持于信号电位保持电容器405的信号电位对应的第一放大信号向读出电路500发送。 Thus, the signal potential of the capacitor 405 and the holding signal is held on the potential of the signal (t5) during a fifth potential corresponding to the first reset capacitor 404 corresponding to the reset potential holding held (T4) during fourth amplifying a signal read-out circuit 500 to transmit.

[0042] 在第七期间（t7)内， [0042] During a seventh (T7) inside,

以及 as well as

成为接通状态的电压，列增幅放大器重置开关302、第一反馈电容器选择开关304以及第二反馈电容器选择开关306接通。 A voltage ON state, an increase of the column amplifier reset switch 302, a first feedback capacitor selection switch 304 and a second feedback capacitor selection switch 306 is turned on.由此，放大器308的输入端子被重置。 Thus, the input terminal of the amplifier 308 is reset.即、浮置扩散单元103以信号电位的状态为基准，列增幅放大器部300被重置。 That is, the floating diffusion unit 103 as a reference potential of the state signal, increase the column amplifier unit 300 is reset.此外，本例中第一反馈电容器选择开关304从第三期间（t3)开始保持接通。 Further, in the present embodiment the first feedback capacitor selection switch 304 remains on the start of the third period (t3) from.

[0043] 接下来，在第一反馈电容器选择开关304断开后，列增幅放大器重置开关302断开。 After [0043] Next, a first feedback capacitor selection switch 304 is turned off, the booster amplifier of the column reset switch 302 is turned off.即、在 That is,

成为断开状态的电位后， After the potential becomes OFF state,

成为断开状态的电位。 The potential to become the OFF state.

保持接通状态的电位，第二反馈电容器选择开关306保持接通状态。 Maintaining the potential on-state, a second feedback capacitor selection switch 306 is kept on.由此，列增幅放大器部300的放大率设定为第二放大率，该第二放大率由输入电容器301的容量与第二反馈电容器305的容量之比决定。 Thus, the column amplification unit 300 for the booster amplifier is set to a second magnification, the second magnification ratio determined by the input capacitance of the capacitor 301 and the capacitance of the second capacitor 305 in feedback.在本例中，因为第一反馈电容器选择开关304的容量和第二反馈电容器305的容量不同，所以第七期间（t7)中设定的列增幅放大器部300的第二放大率，与第五期间（t5)中设定的列增幅放大器部300的第一放大率不同。 In the present embodiment, since the first feedback capacitor selection switches of different capacity and a second feedback capacitor 305 of capacitance 304, so that an increase of the column amplifier unit setting (T7) a second magnification 300 during the seventh, the fifth Unlike the first column amplification unit 300 is set to the booster amplifier (t5) in the period.

[0044] 接下来， [0044] Next,

在规定的时间内成为接通状态的电位，重置电位输入开关402接通规定的时间。 Within a predetermined time becomes the potential on-state, turning on the reset potential of the input switch 402 a predetermined time.由此，在重置电位保持电容器404中保持与信号电位对应的信号。 Accordingly, the hold signal corresponding to the signal potential of the reset potential of the holding capacitor 404.

[0045] 在第八期间（t8)内， [0045] During the eighth (T8) inside,

在规定的时间内成为接通状态的电位，像素重置开关104 接通规定的期间。 Within a predetermined time becomes the potential ON state, pixel reset switch 104 is turned on a predetermined period.由此，浮置扩散单元103的电位被重置。 Accordingly, the potential of the floating diffusion unit 103 is reset.浮置扩散单元103的电位从信号电位变为重置电位。 Potential of the floating diffusion unit 103 from the signal potential to the reset potential.浮置扩散单元103的电位的变动经由像素放大器105以及选择开关106传递至垂直信号线200。 The potential change of the floating diffusion unit 103 is transmitted through the pixel amplifier 105 and a selection switch 106 to the vertical signal line 200.由此，与浮置扩散单元103的从信号电位向重置电位的变动对应的像素信号被输入至列增幅放大器部300。 Thus, the pixel signals corresponding to the signal potential from the reset potential fluctuation of the floating diffusion unit 103 is input to the column amplifier unit 300 increase.输入至列增幅放大器部300的像素信号以第二放大率被放大，该第二放大率由输入电容器301的容量与第二反馈电容器305的容量之比决定，从列增幅放大器部300输出第二放大信号。 The pixel signal is input to the column portion 300 of the booster amplifier is amplified at a second magnification, the second magnification ratio of the capacity of the second feedback capacitor determined by the input capacitance of capacitor 301 is 305, the output from the column portion 300 of the second booster amplifier amplified signal.

[0046] 从列增幅放大器部300输出的第二放大信号的电位，在下式所示的Vout比列增幅放大器部300的电源电压小时，由Vout表示。 [0046], represented by the following formula Vout, Vout is represented by the potential of the second amplified signal from the column amplifier unit 300 increase than the supply voltage output from the amplifier portion 300 hours of growth the column.另外，在Vout为列增幅放大器部300的电源电压以上时，从列增幅放大器部300输出的第二放大信号的电位与列增幅放大器部300的电源电压相等。 Further, when the column Vout booster amplifier portion 300 above the power supply voltage is equal to the increase from the potential of the column amplifier unit and the second amplified signal booster amplifier column portion 300 of the output 300 of the power supply voltage.

[0048] 作为一个例子，设，输入电容器301的容量为lpF、第二反馈电容器305的容量为lpF、浮置扩散单元103的重置电位为4V、像素放大器105的增益为0. 8倍、VREF为2. 0V、 列增幅放大器部300的电源电压为5V。 [0048] As an example, it is assumed, input capacitor 301 is lpF, a second feedback capacitance of the capacitor 305 is lpF, the reset potential of the floating diffusion unit 103 is 4V, the gain of the pixel amplifier 105 is 0.8 times, VREF is 2. 0V, the power supply voltage booster amplifier of the column portion 300 is 5V.而且，浮置扩散单元103的电位从信号电位3V变为重置电位3V。 Further, the potential of the floating diffusion unit 103 from the potential reset signal potential becomes 3V 3V.此时，Vout = 2. 0V+(3V - 4V) Χ0· 8X ( - lpF/lpF) = 1. 2V，比列增幅放大器部300的电源电压5V小。 In this case, Vout = 2. 0V + (3V - 4V) Χ0 · 8X (- lpF / lpF) = 1. 2V, the power supply voltage 300 is smaller than the increase of the column amplifier portion 5V.因此，这时，从列增幅放大器部300输出的第二放大信号的电位为1. 2V。 Thus, this time, the potential of the second amplified signal from the column amplifier unit 300 increase output to 1. 2V.

[0049] 接下来， [0049] Next,

在规定的时间内成为接通状态的电位，信号电位输入开关403接通规定的时间。 Is turned on within a predetermined period of time a potential, the potential of the input signal switch 403 is turned on a predetermined time.由此，在信号电位保持电容器405中保持与重置电位对应的第二放大信号。 Accordingly, the holding capacitor 405 maintains the reset voltage of the second amplified signal corresponding to the signal potential.

[0050] 在第九期间（t9)内， [0050] During the ninth (T9) inside,

成为接通状态的电位，重置电位输出开关406以及信号电位输出开关407接通规定的时间。 The potential becomes the ON state, turning on the reset switch 406 outputs a predetermined potential and a signal potential of the output switch 407 times.由此，与在第七期间（t7)内保持于重置电位保持电容器404的信号电位对应的信号以及与在第八期间（t8)内保持于信号电位保持电容器405的重置电位对应的第二放大信号被向读出电路500发送。 Thus, during the seventh and held in the reset potential of potential holding capacitor 404 signal corresponding to a reset potential 405 and the holding capacitor is held on the potential of the signal (T8) corresponding to the eighth period (T7) of two amplified signal 500 is sent to the readout circuit.控制部700重复从第三期间（t3)至第九期间（t9)的过程，从像素部110读出像素信号。 The control unit 700 repeats the process from the third period (t3) period to ninth (T9) from the pixel unit 110 reads a pixel signal.

[0051] 如上所述，通过第二期间（t2)中光入射至光电转换部101而产生的电荷，第一放大信号以及第二放大信号被向读出电路500读出。 [0051] As described above, the second charge period (t2) to the light incident on the photoelectric conversion portion 101 is generated, the first amplified signal and the second amplified signal to the read out circuit 500 is read out.即、从第三期间（t3)到第六期间（t6) 读出电路500读出第一放大信号。 That is, the sixth period (T6) is read from the third period (t3) the readout circuit 500 first amplified signal.然后从第七期间（t7)到第九期间（t9)读出电路500读出第二放大信号。 And (T7) during the ninth (T9) from the read out circuit 500 during the seventh read a second amplified signal.第一放大信号以及第二放大信号与分别与重置电位以及信号电位对应的信号一同被读出。 Signal and the first amplified signal with second amplified signal, respectively corresponding to the reset potential and the potential of the signal is read out together.因此，能够消除列增幅放大器部300的偏差。 Accordingly, it is possible to eliminate bias portion 300 of the booster amplifier of the column.例如，使用第一放大信号及第二放大信号、与重置电位及信号电位的差量。 For example, using the first amplified signal and the second amplified signal, and the reset potential difference and the signal potential.

[0052] 在本例中，因为第一反馈电容器303的容量和第二反馈电容器305的容量不同，所以第一放大率与第二放大率不同。 [0052] In the present embodiment, since the capacitor capacitance different from the first feedback capacitor and a second feedback capacitance 303 305, the first magnification and the second magnification are different.即、摄像单元910通过一次曝光，将与第一放大信号对应的信号和与第二放大信号对应的信号从摄像单元910向图像处理部912发送。 That is, a single exposure by the imaging unit 910, the transmit signal 910 and a second signal corresponding to the amplified signal the first amplified signal from the imaging means corresponding to the image processing unit 912.图像处理部912将放大率不同的、与第一放大信号对应的信号以及与第二放大信号对应的信号合成，生成动态范围扩大了的图像。 The image processing unit 912 of different magnifications, and the amplified signal and a first synthesized signal corresponding to the second signal corresponding to the amplified signal, generating a dynamic range expanded image.

[0053] 更具体来说，第一放大率比第二放大率大。 [0053] More specifically, the second magnification is larger than the first magnification.在本例中，即使第一放大信号以列增幅放大器部300的电源电位而饱和，第二放大信号也因为放大率比第一放大信号小而不饱和。 In the present embodiment, even if the amplified signal to a first power supply potential increase of the column amplifier unit 300 is saturated, but also because the second amplified signal amplification factor smaller than the first amplified signal without saturation.另外，因为第一次通过比第二放大率大的第一放大率进行读出、第二次通过比第一放大率小的第二放大率进行读出，所以能够减小噪声的影响。 Further, because the first through the second magnification is larger than the first magnification is read out, reading out a second amplification factor smaller than the first by a second amplification factor, it is possible to reduce the influence of noise.即、由于在将电位重置时从晶体管注入载流子而可能产生噪声。 That is, since the reset potential when the carriers are injected from the transistor noise may be generated.因此，通过第七期间（t7)的重置动作，能够防止强度较低的信号受到噪声的影响。 Thus, during the reset operation by the seventh (T7), it is possible to prevent a low intensity signal is affected by noise.

[0054] 图5是说明摄像装置900的图像处理的图。 [0054] FIG. 5 is an explanatory diagram of an image processing apparatus 900 imaging.在对摄像单元910进行曝光而从以比第二放大率大的第一放大率被放大后的第一放大信号得到的图像982中，在被摄物体的明亮部分产生泛白（白i ^ )。 In the imaging unit 910 and exposed, whitened (white i ^) 982 from an image larger than the second magnification first amplified signal is amplified by a first amplification factor obtained in a bright portion of the subject .另一方面，在从以比第一放大率小的第二放大率被放大后的第二放大信号得到的图像980中，在被摄物体的较暗的部分产生曝光不足。 On the other hand, in the image after the second amplified signal 980 is amplified at the amplification factor smaller than the first amplification factor obtained in the second, resulting in underexposure in a dark portion of the subject.例如，图像980的人物部分曝光不足，人物部分的一部分产生发黑（黒9 $ Λ)。 For example, less than 980 characters partially exposed image, resulting in a portion of the black character portion (black 9 $ Λ).

[0055] 图像处理部912能够将图像982以及图像980中最优的部分合成，而得到没有泛白以及发黑、并且不存在曝光不足的部分的图像984。 [0055] The image processing unit 912 and the image 982 can be an image part 980 in the optimal synthesis obtained without blackening and whitening, and underexposed image portion 984 is not present.例如，图像处理部912可以在第一放大信号未饱和时仅使用第一放大信号生成图像。 For example, the image processing unit 912 may be generated using only the first amplified signal the first amplified signal when the image is not saturated.在仅使用第一放大信号生成图像的情况下，图像处理部912可以不使用第二放大信号，或者控制部700也可以使列增幅放大器部300不生成第二放大信号。 In the case where only the first amplified signal to generate an image, the image processing unit 912 may not use a second amplified signal, or the control unit 700 may also increase the column amplifier portion 300 does not generate a second amplified signal.在第一放大信号饱和时，可以通过使用第二放大信号来合成图像984。 When the first amplified signal saturation may be synthesized image 984 by using the second amplified signal.另外，也可以在第二放大信号的强度比规定的电平弱的区域使用第一放大信号。 Further, may also be used in a first amplified signal strength than a predetermined second amplified electrical signal is weak flat region.由此，得到动态范围扩大了的图像。 Thus, to obtain a dynamic range expanded image.

[0056] 作为其他的例子，也可以是，图像处理部912分别根据与由第一放大率放大后的第一放大信号对应的信号、和与由第二放大率放大后的第二放大信号对应的信号各生成一个图像。 [0056] As another example, may also be, according to the image signal processing unit 912 respectively correspond to the first amplified signal is amplified by the first amplification factor, and a second amplified signal amplified by the second amplification factor corresponding to generating a signal in each image.即、图像处理部912也可以生成与图像982以及图像980这两个图像对应的图像数据并将其保存于摄像存储器922。 That is, the image processing unit 912 may generate the image 982 and the image 980 corresponding to the two images of the image data and store it in the image memory 922.由此，通过一次的曝光能得到放大率不同的两个图像。 Accordingly, the exposure can be obtained by one of two images with different magnifications.

[0057] 图6是说明摄像单元910的构成的另外一个例子的图。 [0057] FIG. 6 is a diagram illustrating another example of the configuration of the imaging unit 910 of FIG.图6所示的摄像单元910 与图2所示的摄像单元910的不同点在于具有判定部220。 FIG imaging unit 910 shown in FIG 6 is different from the imaging unit 910 shown in FIG. 2 is characterized by having a determining unit 220.摄像单元910具备像素部110、 负载电流源201、列增幅放大器部300、判定部220、电位保持部400、读出电路500、垂直扫描部600、控制部700、AFE710 以及ADC720。 The imaging unit 910 includes a pixel portion 110, a load current source 201, an increase of the column amplifier unit 300, determination unit 220, potential holding portion 400, readout circuitry 500, the vertical scanning unit 600, a control unit 700, AFE710 and ADC720.

[0058] 判定部220被控制部700控制，将列增幅放大器部300输出的放大信号与规定电平的信号进行比较。 [0058] The determination unit 220 is a control section 700 controls the increase of the column amplifier unit amplifies the signal 300 and the output signal of a predetermined level is compared.判定部220构成为包含例如比较器。 Determination unit 220 configured to include a comparator, for example.判定部220将比较的结果与列增幅放大器部300输出的放大信号建立关联。 Determination unit 220 compares the amplified signal with the result of the column amplifier unit 300 outputs an increase in association.

[0059] 本例中判定部220判定由列增幅放大器部300输出的放大信号是否处于饱和状态。 In the [0059] determination unit 220 of the present embodiment determines whether the column is saturated by the amplified signal output from the booster amplifier section 300.例如，在第一放大率比第二放大率大的情况下，判定部220判定以第一放大率被放大后的第一放大信号是否处于饱和状态，并将判定的结果与第一放大信号以及第二放大信号中至少一方建立关联。 For example, in the second magnification is larger than the first magnification, the determination unit 220 determines a first amplified signal is amplified by the first amplification factor is in a saturated state, and the determination result of the first amplified signal and at least one of the second amplified signal associated.作为一个例子，第一放大信号以及第二放大信号，除与各自的放大信号对应的单位像素100的地址以及与入射光的强度对应的信号之外，还具有表示第一放大信号是否处于饱和状态的状态标志。 As an example, the first amplified signal and a second amplified signal, in addition to the unit address corresponding to the respective pixels amplified signal 100 and a signal corresponding to the intensity of incident light, also having a first amplified signal indicates whether the state of saturation status flags.表示第一放大信号是否处于饱和状态的状态标志例如是1比特的信号。 It represents a first amplified signal is in a saturated state flag, for example, 1-bit signal.

[0060] 在状态标志表示以比第二放大率大的第一放大率被放大后的第一放大信号未处于饱和状态的情况下，控制部700可以不执行第二放大信号的读出。 [0060] In the case where the status flag indicates a second magnification greater than the first amplified signal is amplified by a first amplification factor is not in the saturated state, the control unit 700 may not perform the readout of the second amplified signal.由此，读出变得高速。 As a result, the high-speed readout becomes.

[0061] 图7是说明由摄像装置900进行的图像处理的流程图。 [0061] FIG. 7 is a flowchart illustrating image processing performed by the image pickup device 900.图7的流程图是与图6所示的摄像单元910对应的流程的一个例子。 FIG 7 is a flowchart of an example of the image pickup unit 910 shown in FIG. 6 corresponding to the process.流程例如在摄像单元910被曝光之前，从重置的阶段开始。 For example, before the imaging process unit 910 is exposed, from the beginning of the reset phase.在步骤S950中，控制部700使传输门102断开，使像素重置开关104接通。 In step S950, the control unit 700 causes the transmission gate 102 is turned off, the pixel reset switch 104 is turned on.由此，浮置扩散单元103的电位被重置，成为重置电位。 Accordingly, the potential of the floating diffusion unit 103 is reset, the reset potential becomes.其后，摄像单元910被曝光，根据入射至光电转换部101的光而产生电荷。 Thereafter, the imaging unit 910 is exposed, and generates a charge according to light incident on the photoelectric conversion portion 101.

[0062] 在步骤S952中，控制部700使像素重置开关104断开，使传输门102接通。 [0062] In step S952, the control unit 700 causes the pixel reset switch 104 OFF, the transmission gate 102 is turned on.由此使浮置扩散单元103的电位成为电荷积累后的信号电位。 Whereby the potential of the floating diffusion unit 103 becomes the potential of the signal charge accumulation.而且，控制部700使与从重置电位向信号电位的变动对应的像素信号即第一像素信号向垂直信号线200输出。 Further, the vertical signal line 200 is output to the control unit 700 causes the pixel signal from the reset potential corresponding to a potential change in the signal, i.e. the first pixel signal.

[0063] 在步骤S954中，控制部700使列增幅放大器部300以第一放大率放大第一像素信号，其中第一放大率由输入电容器301与第一反馈电容器303的容量之比决定。 [0063] In step S954, the control unit 700 causes the column 300 to a first portion of the booster amplifier of a first pixel signal amplification factor, wherein the first magnification ratio determined by the input capacitance of the first capacitor 301 and feedback capacitor 303.然后，控制部700使列增幅放大器部300输出以第一放大率被放大后的第一像素信号即第一放大信号。 Then, the control unit 700 of the output amplifier portion 300 so as to increase the column of the first pixel signal is amplified by the first amplification factor i.e. a first amplified signal.

[0064] 在步骤S956中，控制部700使判定部220判定第一放大信号是否处于饱和状态。 [0064] In step S956, the control unit 700 causes the determination unit 220 determines whether the first amplified signal is saturated.判定部220在状态标志表示第一放大信号为饱和状态的情况下，进入步骤S956。 A state determination unit 220 in the first flag indicates the case where the amplified signal is saturated, the process proceeds to step S956.判定部220 在状态标志表示第一放大信号未处于饱和状态的情况下，进入步骤S962。 A state determination unit 220 in the first flag indicates the case where the amplified signal is not saturated, the process proceeds to step S962.判定部220也可以如上所述地，将判定的结果与第一放大信号以及第二放大信号中至少一方建立关联。 Determination unit 220 may be as described above, with the results of the determination of at least one of the second signal and the first amplified signal associated amplification.

[0065] 在步骤S958中，控制部700使传输门102断开，并再次使像素重置开关104接通。 [0065] In step S958, the control unit 700 causes the transmission gate 102 is turned off, and the pixel reset switch 104 is turned on again.由此，控制部700使浮置扩散单元103的电位成为重置电位，并使其输出与从信号电位向重置电位的变动对应的像素信号即第二像素信号。 Accordingly, the control unit 700 causes the potential of the floating diffusion unit 103 becomes a reset potential, and its output corresponding to the pixel signal changes from the reset potential to the signal potential of the second pixel signal, that is.

[0066] 在步骤S960中，控制部700使列增幅放大器部300以第二放大率放大第二像素信号，其中第二放大率由输入电容器301与第二反馈电容器305的容量之比决定。 [0066] In step S960, the, the control unit 700 causes the column 300 to a second portion of the booster amplifier amplifying a second pixel signal amplification factor, wherein the second magnification ratio determined by the input capacitance of the second capacitor 301 and feedback capacitor 305.另外，控制部700使列增幅放大器部300输出第二放大信号。 Further, the control unit 700 causes an increase of the column amplifier unit 300 outputs the second amplified signal.作为一个例子，第二放大信号置换步骤S954中输出的第一放大信号，而从摄像单兀910输出。 As an example, the second amplified signal the first amplified signal output permutation step S954, and the output from the imaging unit 910 Wu.

[0067] 在步骤S962中，图像处理部912根据摄像单元910经由总线926而输出的第一放大信号以及第二放大信号的一方或双方来生成图像。 [0067] In step S962, the image processing section 912 in accordance with one of the first amplified signal via bus 926 and output from the imaging unit 910 and the second amplified signal to generate an image or both.例如，图像处理部912对于与输出有未处于饱和状态的第一放大信号的区域对应的图像数据的生成仅使用第一图像信号。 For example, the image processing unit 912 for generating a first amplified signal region not in a saturated state corresponding to the output image data using only the first image signal.另夕卜，图像处理部912对于与输出有第二放大信号的单位像素100对应的区域的图像数据的生成，例如仅使用第二放大信号。 Another Bu Xi, the image processing unit 912 generates image data for the second amplified signal to the output unit 100 corresponding to the pixel region, for example, only the second amplified signal.但是，在存在与使用第一放大信号生成图像数据的区域相邻且使用第二放大信号生成图像数据的区域的情况下，可以在该两区域的边界附近由图像处理部912对图像数据进行处理，以使得不会因放大率不同而在该边界附近区域形成不自然的图像。 However, when using the first region is present in the amplified signal and generating image data using a second adjacent signal generating image data of an enlarged region, 912 pairs may be processed by the image processing unit in the image data near the boundary of the two regions , so as not to form an unnatural image in the region near the boundary due to different magnifications.例如，图像处理部912将距该边界规定范围内的使用第二放大信号的区域的图像数据修正得较亮。 For example, the image processing unit 912 of the image data region using the second amplified signal from within a predetermined range of the boundary corrected to be brighter.图像处理部912可以在上述处理中使用判定部220所建立关联的判定结果。 The image processing unit 912 may be used in the above determination result processing unit 220 is associated.

[0068] 摄像系统控制部924以及控制部700结束一系列处理。 [0068] The camera system control section 924 and the control unit 700 ends the series of processing.以上的一系列处理，能够由摄像存储器922所保存的程序使摄像系统控制部924以及控制部700执行。 The above series of processes, the imaging system can be controlled by the image pickup unit 922 stored in the program memory 924 and a control unit 700 performs.

[0069] 在上述中，虽然对由步骤S960中控制部700使列增幅放大器部300输出的第二放大信号置换步骤S954中输出的第一放大信号的例子进行了说明，但并不限于此，也可以是步骤S954中输出的第一放大信号以及步骤S960中输出的第二放大信号的双方从摄像单元910输出。 [0069] In the above, although the example of the first amplified signal from the control unit 700 in step S960 that the increase of the column amplifier unit 300 outputs a second amplified signal output from the displacement step S954 has been described, but is not limited thereto, may also output a second amplified signal the first amplified signal and output in step S954 in step S960 is output from the imaging unit 910 of both.在这种情况下，图像处理部912可以使用第一放大信号以及第二放大信号双方生成一个图像。 In this case, the image processing unit 912 may use a first amplified signal and generating a second amplified signal both images.

[0070] 在以上的例子中，虽然说明了一个光电转换部101分别具有浮置扩散单元103、像素重置开关104、像素放大器105以及选择开关106各一个的构造（称为4Tr像素），但并不限于4Tr像素，具有由多个光电转换部101共用浮置扩散单元103、像素重置开关104、像素放大器105、选择开关106的构造的摄像单元910也能够进行与上述相同的动作。 [0070] In the above example, the description of a photoelectric conversion portion 101 each have a floating diffusion unit 103, pixel reset switch 104, 105 and selecting a configuration of each pixel amplifier switch 106 (referred 4Tr pixels), but 4Tr pixels is not limited to, having a common floating diffusion unit 103 by a plurality of photoelectric conversion portions 101, pixel reset switch 104, the pixel amplifier 105, configured to select the imaging unit 910 of the switch 106 can perform the same operation as described above.另外， 电位保持部400也可以具备另一组电位保持部。 Furthermore, potential holding portion 400 may be provided with another set of potential holding portion.由此，能够缩短信号的读出所需的时间。 Accordingly, it is possible to shorten the time required to read out a signal.

[0071] 另外，在上述例子中，虽然对在列增幅放大器部300上连接有电位保持部400的例子进行了说明，但并不限于此，例如在列增幅放大器部300的后级具备ADC720的摄像单元910也能够相同地动作。 [0071] Further, in the above example, although the increase in the row connected to the amplifier unit 300 there are examples of the potential holding portion 400 has been described, but not limited to, for example, increase the column amplifier stage includes a rear portion 300 in ADC720 same imaging unit 910 can be operated.在这种情况下，与列增幅放大器部300连接的ADC720将从列增幅放大器部300接收的信号转换为数字信号，并向电位保持部400输出。 In this case, the ADC 720 is connected to the booster amplifier of the column portion 300 from the column signal converting unit 300 receives the booster amplifier into a digital signal, and an output section 400 holding potential.电位保持部400在控制部700所控制的定时将数字信号向读出电路500发送。 400 500 potential holding unit in the transmission control unit 700 controls the timing of the digital signal to the readout circuitry.摄像单元910具备DFE (digital front-end :数字前端），读出电路500向DFE发送信号。 The imaging unit 910 includes a DFE (digital front-end: a digital front end), the readout circuit 500 sends a signal to DFE.DFE使接收的信号的电平一致，并向总线926输出。 DFE make a consistent level of the received signal, and output bus 926.

[0072] 另外，虽然在以上的例子中，对第一放大率以及第二放大率为被预先设定的放大率的例子进行了说明，但并不限于此，也可以从多个放大率中选择并设定第一放大率以及第二放大率。 [0072] Further, although in the above example, an example of the first magnification and the second magnification magnification is set in advance has been described, but is not limited thereto, it may be from a plurality of amplification selecting and setting a first magnification and a second magnification.例如，也可以在由输入电容器301与第一反馈电容器303之比决定的放大率、 由输入电容器301与第二反馈电容器305之比决定的放大率、以及由输入电容器301与并联地连接的第一反馈电容器303以及第二反馈电容器305之比决定的放大率中，选择第一放大率以及第二放大率。 For example, magnification may be determined by the ratio of the input capacitor 301 of the first feedback capacitor 303, an input 301 and a second feedback capacitor magnification ratio decision 305, a capacitor 301 and a second input connected by a capacitor in parallel magnification of a feedback capacitor 303 and a second feedback capacitor 305 determines the ratio, selecting a first magnification and a second magnification.

[0073] 另外，例如也可以在列增幅放大器部300的反馈回路中并联地具备三组以上的反馈电容器选择开关以及反馈电容器。 [0073] Further, for example, may be provided in parallel three or more sets of selection switches feedback capacitor and a feedback capacitor for the booster amplifier in the feedback loop the column portion 300.三组以上的反馈电容器选择开关以及反馈电容器可以单独或组合地分别对应不同的放大率。 Three or more sets of the feedback capacitor and a feedback capacitor selection switch may be alone or in combination, respectively corresponding to different magnifications.该不同的放大率可以分别对应不同的ISO感光度。 This may correspond to different magnifications different ISO sensitivity, respectively.

[0074] 控制部700也可以将与受理部914所受理的使用者指定的ISO感光度对应的放大率设定为第一放大率或第二放大率中某一方的放大率。 [0074] The control unit 700 may be specified by the user accepting unit accepts a 914 ISO speed corresponding to the magnification set to the first or second amplification factor in the amplification factor of the amplification factor either.另外，控制部700可以根据AE传感器916的检测结果，将第一放大率或第二放大率的另一方设定为与摄像系统控制部924演算出的ISO感光度对应的放大率。 Further, the control unit 700 may be based on detection results of the AE sensor 916, the first magnification or the magnification of the second set to the other of the imaging system control unit 924 calculating an amplification factor corresponding to the ISO sensitivity.此时，与ISO感光度对应的放大率可以由摄像系统控制部924演算并向控制部700发送。 At this time, the amplification factor corresponding to ISO sensitivity can be transmitted to the control unit 700 by the camera system control section 924 arithmetic.控制部700可以与从摄像系统控制部924发送的放大率对应地，从列增幅放大器部300具备的多个反馈电容器的中单独任选一个或选择多个，来设定第一放大率或第二放大率。 The control unit 700 may correspond with the magnification of the imaging system 924 is transmitted from the control unit, from the plurality of feedback capacitors of the column portion 300 includes a booster amplifier to optionally select a single or a plurality of, or the amplification factor of the first set two magnification.

[0075] 作为其他的例子，也可以是，受理部914受理两个基于使用者进行的ISO感光度的选择，将与受理部914所受理的两个ISO感光度对应的放大率分别向控制部700发送。 [0075] As another example, it may be that two receiving unit 914 receives the user performs selection based on the ISO sensitivity, corresponding to the two ISO sensitivity accepting unit 914 receives the amplification factor control unit respectively 700 sent.在这种情况下，控制部700也可以设定第一放大率以及第二放大率。 In this case, the control unit 700 may set the first magnification and the second magnification.

[0076] 以上，虽然使用实施方式对本发明进行了说明，但是本发明的技术范围并不限定于上述实施方式所述的范围。 [0076] above, although embodiments of the present invention has been described, the technical scope of the present invention is not limited to the above described embodiments.例如，摄像装置900也可以将摄像单元910的输出作为反馈来用作检测亮度的检测部。 For example, imaging device 900 may be output from the imaging unit 910 is used as a feedback detecting unit detecting the brightness.另外，基于摄像单元摄像装置900进行的图像处理并不限于图7 的例子，也可以是，图2或图6所示的摄像单元910分别输出基于第一放大信号以及第二放大信号双方的信号，图像处理部912生成一个或两个图像。 Further, the image processing performed by the imaging apparatus 900 based on the imaging means is not limited to the example of FIG. 7, it may be that the image pickup unit 910 shown in FIG. 2 or FIG. 6, respectively, based on the first amplified signal and output a second amplified signal both The image processing unit 912 generates one or both images.在图6所示的摄像单元910分别输出基于第一放大信号以及第二放大信号双方的信号的情况下，图像处理部912也可以使用判定部与第一放大信号以及第二放大信号的至少一方建立关联的判定结果来生成一个图像。 It outputs a first amplified signal based on the case where the second amplified signal and both signals, the image processing unit 912 may use the determination unit and the second signal and the first amplified signal is amplified in the image pickup unit 910 shown in FIG. 6 at least one of the association determination result to generate one image.

[0077] 另外，虽然在以上的例子中对摄像单元910具备CMOS传感器的情况进行了说明， 但并不限于此，本发明也能够适用于具备CCD传感器的摄像单元910。 [0077] Further, although the case where the image pickup unit includes the CMOS sensor 910 in the above example has been described, but is not limited thereto, the present invention is also applicable to the imaging unit 910 includes a CCD sensor.在具备CCD传感器的摄像单元910的情况下，例如，能够使用如下的构成：使用浮置扩散放大器将通过C⑶的移位寄存器而传输的信号电荷转换为电压。 In the case where the image pickup unit 910 includes a CCD sensor, for example, the following configuration can be used: using a floating diffusion amplifier signal charges transmitted by C⑶ shift register into a voltage.本领域技术人员可以明确，能够对上述实施方式追加多种变更或改良。 Those skilled in the art can ascertain, various alterations and improvements can be added to the above-described embodiments.从权利要求书的记载可以明确，这种追加变更或改良的方式也包含在本发明的技术范围内。 From the description of the scope of claims it is clear that such changes or improvements added is also included in the technical scope of the invention.

[0078] 应当注意的是，关于权利要求书、说明书以及附图中表示的装置、系统、程序以及方法中的动作、次序、步骤及阶段等各处理的执行顺序，只要并未特别地明示为"之前"、 "在…之前"等、另外并未将前面处理的输出用于后面的处理，则能够以任意的顺序实现。 [0078] It should be noted that, regarding the claims, performed in any order, and the description of the apparatus shown in the drawings, the system, method, and program operations, procedures, steps and stages etc., is not particularly specified as long as "before", "prior to ..." and so on, not further output from a previous process for the subsequent processing, can be realized in any order.关于权利要求书、说明书以及附图中的动作流程，即使为了便利而使用"首先，"、"接下来，"等进行了说明，也并不意味着必须以该顺序实施。 About the claims, the specification and drawings of the operation flow, even when used for convenience "First," "next," and the like have been described, it is not meant to be implemented in this order.

Claims (14)

Translated from Chinese

1. 一种摄像单元，其特征在于，具备： 像素部，该像素部输出与重置后的重置电位和电荷积累后的信号电位对应的像素信号； 放大器部，该放大器部将所述像素信号以第一放大率或与第一放大率不同的第二放大率放大；以及控制部，该控制部使所述放大器部在将与从所述重置电位向所述信号电位的变动对应的所述像素信号以所述第一放大率放大后，将与从所述信号电位向所述重置电位的变动对应的所述像素信号以所述第二放大率放大。 An image pickup unit comprising: a pixel signal after the signal potential of the pixel portion, the pixel portion and the reset potential of the accumulated charge corresponding to a reset output; an amplifier unit, the amplifier portion of the pixel amplifying the first signal with a first magnification ratio or different from the second magnification; and a control unit which controls the amplifier section in the portion corresponding to the potential from the reset potential of the change in the signal after the pixel signal amplified at the first magnification, the pixel signals corresponding to the change in the potential of the reset potential to the signal from said amplified at the second magnification.

2. 根据权利要求1所述的摄像单元，其特征在于， 所述像素部具有： 光电转换部； 传输门，该传输门将由所述光电转换部产生的电荷向浮置扩散单兀传输；以及像素重置开关，该像素重置开关将积累于所述浮置扩散单元的所述电荷排除，从而将所述浮置扩散单元的电位从所述信号电位重置为所述重置电位。 2. The image pickup unit according to claim 1, wherein said pixel portion has: a photoelectric conversion portion; transfer gate, the transfer gate charge generated by the photoelectric conversion unit to the transmission diffusion single floating Wu; and pixel reset switch, the reset switch of the pixel of the accumulated electric charge to the floating diffusion unit is excluded, so that the potential of the floating diffusion unit from the potential reset signal to the reset potential.

3. 根据权利要求1或2所述的摄像单元，其特征在于， 所述第一放大率比所述第二放大率大。 The imaging unit according to claim 1, wherein said first magnification is larger than said second magnification.

4. 根据权利要求3所述的摄像单元，其特征在于， 所述控制部在通过所述放大器部以所述第一放大率被放大后的所述像素信号未饱和的情况下，不执行基于所述第二放大率进行的所述像素信号的放大。 The imaging unit according to claim 3, characterized in that the control unit through the amplifier portion of the pixel signals to the first magnification amplified without saturation is not executed based on amplifying the pixel signal of said second amplification factor performed.

5. 根据权利要求1至4中任一项所述的摄像单元，其特征在于， 具备判定部，该判定部判定通过所述放大器部而被放大后的所述像素信号是否处于饱和状态， 所述控制部使基于所述判定部的判定结果与以所述第一放大率被放大后的所述像素信号以及以所述第二放大率被放大后的所述像素信号的至少一方建立关联。 An image pickup unit according to any one of claims 1-4, further comprising a determination section, the determination section determines that the pixel signal is amplified by the amplifier portion is in a saturated state, the said control unit at least one of the first and the amplification factor of the pixel signal after the pixel signal is amplified, and after being amplified at a second amplification factor of the association based on the determination result of the determination unit.

6. 根据权利要求1至5中任一项所述的摄像单元，其特征在于， 所述放大器部具有： 用于规定所述第一放大率的第一电路； 与所述第一电路并联地设置并用于规定所述第二放大率的第二电路；以及与所述第一电路以及所述第二电路并联地设置并包含用于将所述放大器部重置的重置开关的重置电路， 所述控制部在使所述重置开关接通的状态下选择所述第一电路或所述第二电路后，使所述重置开关断开。 According to an imaging unit according to any of claims 1 to 5, wherein the amplifier portion includes: a first predetermined amplification factor of the first circuit for; parallel with the first circuit and setting the second circuit for a second predetermined magnification; and setting the first circuit and the second circuit comprising parallel and reset circuit for resetting the amplifier portion of the reset switch after the control unit causes the reset switch is turned on in a state where the first selection circuit or the second circuit, the reset switch is turned off.

7. 根据权利要求2所述的摄像单元，其特征在于， 所述控制部进行如下处理：在通过使所述传输门断开并使所述像素重置开关接通而使所述浮置扩散单元的电位成为所述重置电位后，通过使所述像素重置开关断开并将所述传输门在接通一定期间后断开而使所述浮置扩散单元的电位成为所述信号电位，并使所述像素部输出与从所述重置电位向所述信号电位的变动对应的所述像素信号，另外，通过再次使所述像素重置开关接通而使所述浮置扩散单元的电位成为所述重置电位，并使所述像素部输出与从所述信号电位向所述重置电位的变动对应的所述像素信号。 The imaging unit according to claim 2, wherein said control unit performs the following processing: through the transfer gate and the disconnecting switch is turned on so that the pixel reset the floating diffusion potential unit after the reset potential becomes, by the pixel reset switch is off and the transmission gate is turned OFF after a certain period so that the potential of the floating diffusion section becomes the signal potential , and the pixel unit outputs the pixel signal from the reset potential variation corresponding to the signal potential, Furthermore, the pixel reset by turning on the switch again to the floating diffusion unit the potential of the reset potential of the pixel signal, and outputs the pixel portion corresponding to the reset potential changes from the signal potential to said.

8. -种摄像装置，其特征在于，具备： 权利要求1至7中任一项所述的摄像单元；以及取得通过所述放大器部而被放大后的多个所述像素信号并生成图像数据的图像处理部。 8. - kind of imaging apparatus comprising: an imaging unit 1 in any 7-1 claim 1; and obtaining the plurality of the pixel signal is amplified by the amplifier unit to generate image data an image processing unit.

9. 根据权利要求8所述的摄像装置，其特征在于， 具备受理由使用者进行的ISO感光度的选择的受理部， 所述控制部将与所述受理部所受理的所述ISO感光度对应的放大率设定为所述第一放大率以及所述第二放大率中某一方的放大率。 9. The imaging apparatus according to claim 8, further comprising a selection receiving unit receives the ISO sensitivity performed by the user, the control unit the accepting unit accepts the ISO sensitivity set amplification factor corresponding to the magnification of said first magnification and a second magnification in either one.

10. 根据权利要求9所述的摄像装置，其特征在于， 具备检测被摄物体的亮度的检测部， 所述控制部将基于所述检测部的检测结果而设定的放大率设定为与所述一方的放大率不同的另一方的放大率。 10. The imaging apparatus according to claim 9, further comprising a detection unit detecting the brightness of the subject object, the control unit based on the detection result of the detecting portion is set to set the amplification factor magnification magnification different from the one the other.

11. 根据权利要求8所述的摄像装置，其特征在于， 具备受理两个由使用者进行的ISO感光度的选择的受理部， 所述控制部将与所述受理部所受理的两个所述ISO感光度对应的放大率分别设定为所述第一放大率以及所述第二放大率的放大率。 11. The imaging apparatus according to claim 8, further comprising a selection receiving unit receives two ISO sensitivity performed by the user, two of the control unit to the accepting unit accepts the said amplification factor corresponding to ISO sensitivity are set to said first magnification and said second magnification magnification.

12. 根据权利要求8至11中任一项所述的摄像装置，其特征在于， 所述图像处理部在以所述第一放大率被放大后的所述像素信号饱和的情况下，由以所述第二放大率被放大后的所述像素信号进行置换，并生成与一个图像对应的图像数据。 12. The image pickup apparatus 8 to 11 according to any one of the preceding claims, wherein the image processing unit in the first case where the pixel signal amplification factor of the saturation to be enlarged, to the the amplification factor of the second pixel signal is amplified replaced, and generates image data corresponding to one image.

13. 根据权利要求8至11中任一项所述的摄像装置，其特征在于， 所述图像处理部生成将以所述第一放大率被放大后的所述像素信号和以所述第二放大率被放大后的所述像素信号分别各形成一个图像的图像数据。 13. The image pickup apparatus 8 to 11 according to any one of the preceding claims, wherein the image processing unit will generate the pixel signal and to said first magnification after being amplified second the pixel signals are amplified amplification factor of each image data of one image is formed.

14. 一种控制程序，该控制程序用于摄像单元，该摄像单元具备：光电转换部；传输门， 该传输门将由所述光电转换部产生的电荷向浮置扩散单元传输；像素重置开关，该像素重置开关将积累于所述浮置扩散单元的所述电荷排除，从而将所述浮置扩散单元的电位从信号电位重置为重置电位；以及放大器部，该放大器部将基于所述浮置扩散单元的电位而输出的像素信号放大，所述控制程序的特征在于， 使计算机执行如下步骤： 通过使所述传输门断开并使所述重置开关接通而使所述浮置扩散单元的电位成为所述重置电位的步骤； 通过使所述重置开关断开并使所述传输门在接通一定期间后断开而使所述浮置扩散单元的电位成为所述信号电位，并输出与从所述重置电位向所述信号电位的变动对应的所述像素信号即第一像素信号的步骤； 使所述放大器部将 14. A control program, a program for controlling the image pickup unit, the imaging unit includes: a photoelectric conversion portion; transfer gate, the transfer gate charge generated by the photoelectric conversion section to the floating diffusion transfer unit; pixel reset switch the pixel reset switch accumulated in the charge of the floating diffusion unit is excluded, so that the potential of the floating diffusion is reset unit resets the potential of the signal potential; and an amplifier portion of the amplifier unit based on the pixel signal of the floating diffusion and the potential of the output amplifying means, wherein said control program causes the computer to perform the steps of: disconnecting the transfer gate and the reset switch is turned on so that the potential of the floating diffusion section becomes the reset potential step; by the reset switch is turned off and the transmission gate is turned on for a certain period after the OFF potential of the floating diffusion unit to become the the potential of said signal, and the step of outputting the pixel signal corresponding to a potential change in the signal, i.e. the potential of the pixel signal from the first reset; the amplifier unit述第一像素信号通过第一放大率放大的步骤； 通过再次使所述重置开关接通而使所述浮置扩散单元的电位成为所述重置电位，并输出与从所述信号电位向所述重置电位的变动对应的所述像素信号即第二像素信号的步骤； 以及使所述放大器部将所述第二像素信号通过第二放大率放大的步骤。 The step of said first pixel signal amplified by the first amplification factor; by the reset switch is turned on again so that the potential of the floating unit becomes the reset diffusion potential, and the potential of the output signal from said the pixel signal corresponding to a step change in the potential of the reset signal, i.e., the second pixel; and the second portion of the pixel amplifier signal amplification factor by a second step.

CN 2013800210392012-02-242013-02-25Imaging unit, imaging device, and control program
CN104247402A
(en)